I have a dashboard panel with a table. I am able to change the drilldown search when selecting a row in the panel table to open a new window with the new search:
        <search>
          <query>index=$Environment$ ( program=*shot_director OR program=cryo_director* ) shot_Id=$shotIdPattern$ "Commanded|GoToState" | sort _time | table _time,program,shot_Id,slc_State</query>
          <earliest>$shotEarliest$</earliest>
        </search>
        <drilldown>
          <link target="_blank">
            /app/search/search?q=search index=$Environment$ "<macro_step_complete>" "Execution of Macro Step " shot_id=$shotIdPattern$ | eval subsystem=shot_supervisor | sort -_time 
          </link>
        </drilldown>    
but when I add the regex
| rex field=taxon (?<ss>[^|]*)[|]
creating
            /app/search/search?q=search index=$Environment$ "<macro_step_complete>" "Execution of Macro Step " shot_id=$shotIdPattern$ | rex field=taxon (?<ss>[^|]*)[|] | eval subsystem=shot_supervisor | sort -_time 
the search window created results in:
index=iccs_int "<macro_step_complete>" "Execution of Macro Step " shot_id=N160613-003* | rex field=taxon (
in the search box and the error
Error in 'rex' command: Encountered the following error while compiling the regex '(': Regex: missing ) 
It seems the "?" in the regex is being consumed before it is being sent to the search app.
Any ideas?
Thanks in advance!
Is it working for you now? I have the same issue.
Every "?" in the search string must be replaced with %3F. The only exception is if you are editing .XML dashboard. In which, you will replace all except for the first one at the beginning of the link section.
<link target="_blank">search?q=
All other ?s must be changed to %3F whether in the extraction, or when escaped out in matching text.
 
					
				
		
@flegel2 I fixed it by placing the ASCII value of ? in the query. Its ASCII value is %3F
 
					
				
		
The rex string needs to be in double-quotes like this:
 | rex field=taxon "(?<ss>[^|]*)[|]"
The quotes has no effect on the results.
 
					
				
		
if you save your search as a 'saved search' and call the drilldown as a link target in your dashboard the rex should work.
so:
dashboard:
search?q=|savedsearch [name of savedsearch] 
If you've used arguments in your saved search you should als use them in the link of course.
Saved search:
Here you can use the rex syntax as usualy.
This solution works correctly as well.
 
					
				
		
Try using CDATA, like this
<link>
<![CDATA[
  /app/search/search?q=search index=$Environment$ "<macro_step_complete>" "Execution of Macro Step " shot_id=$shotIdPattern$ | rex field=taxon (?<ss>[^|]*)[|] | eval subsystem=shot_supervisor | sort -_time 
]]>
</link>
Using CDATA has no effect on the results.
